Write the hormone which increase the length of grapes, stalks improves the shape of apple and speed up the malting process in brewing industry.

Answer

**Step-by-Step Solution:**

1. **Identify the Function of the Hormone**: The question asks for a hormone that increases the length of grape stalks, improves the shape of apples, and speeds up the malting process in the brewing industry.

2. **Recall Plant Hormones**: There are several plant hormones known to influence growth and development, including auxins, cytokinins, gibberellins, and abscisic acid.

3. **Focus on Gibberellins**: Among these hormones, gibberellins are known for promoting stem elongation, fruit development, and seed germination.

4. **Specific Effects of Gibberellins**:
- **Lengthening Grape Stalks**: Gibberellins promote elongation of stems, which would increase the length of grape stalks.
- **Improving Apple Shape**: Gibberellins can enhance fruit growth and shape, making apples more uniform and larger.
- **Speeding Up Malting Process**: In the brewing industry, gibberellins are used to promote the germination of barley, which is essential for malting.

5. **Conclusion**: Based on the functions mentioned, the hormone that fulfills all these criteria is **Gibberellin**.

**Final Answer**: Gibberellin

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